The subject invention provides for systems and methods that facilitate optimizing one or mores sets of training data by utilizing an Exponential distribution as the prior on one or more parameters in connection with a maximum entropy model to mitigate overfitting. Each disc-shaped filter member has a filtering material disposed on the outside thereof. Means are provided for allowing the wheel, or wheels, driven by the dedicated power drive unit to freewheel when the dedicated power drive unit is not in use.